Metal-shearing machine.



PATENTED A111120, 1907. l H. JOHN.

METAAL SHEARING MACHINE. PPLIOATION FILED 17211.14. 1901.

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PATENTED AUG. 20, 1907.

H. JUHN. METAL SHBAR'ING MACHINE.

APPLICATION IILD FEB. 14. 1907.

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HUGO JOHN, OF ERFURT, GERMANY.

METAL-SHEARING MACHINE.

Speeication of Letters Patent.

Patented Aug. 20, 1907.

Application led February 14,1907. Serial No. 357,378.

To all whom it may concern:

Be it known that I, HUGO JOHN, manufacturer, a subject ofthe King ofPrussia, residing at Erfurt, Kingdom of Prussia, German Empire, haveinvented certain new and useful Improvements in Metal-shearing Machines,of which the following is a specification.

My invention relates to shears with two oblique supports for cuttingsectional iron, characterized by a peculiar group of fixed andinterchangeable cutters being provided for cutting angleand T-irons, andfurther by the machine being provided with stops, support blocks andholding-down devices for the purpose of exactly maintaining a straightor an inclined cutting angle.

An apparatus embodying the invention is illustrated in the accompanyingdrawing, in which Figure 1 shows the general arrangement in elevation,Fig. 2 is a section on the line A-B of Fig. 1. Figs. 3, 4 and 5 show thecutter group with fixed and interchangeable cutters. Fig. G showsanother arrangement of the cutter group for the purpose of cutting thefiange in T- iron girders. Figs. '7, 8 and 9 show the holding-downdevices, and Figs. 10, 11 and 12 a device for adjusting the cutters.

In the frame 1 of the machine are arranged two slide rests 2 and 3obliquely guided at an angle of 45 and to each of them is secured anupper cutter 4. These upper cutters serve for all straight or obliquecutting as well for angle-iron as for T-irons. On the slide rest is alsomounted a bottom cutter' 5 which is used for cutting T-irons. Figs'S to5 show a left hand slide rest 2, of which the cutter group cuts T-ironsobliquely in the web, while the cutter group of the right hand sliderest 3 is arranged for cutting angle-irons. A long cutter 6 is providedwhich in cutting T-irons affords support to the flange of the T-iron,and is in a Vertical position (Fig. 3 on the left hand side).

In cutting angle irons, the long cutter is utilized as the bottomcutter, for cutting the horizontal flange, and is accordingly mountedhorizontally. The cutting of the vertical flange is effected by means ofthe lateral cutter 7 which stands on the cutter 6 (Fig. 3 on the righthand side). In cutting T-irons, when the long lateral cutter 6 is invertical position, the short cutter 7 is done away with and replaced byAa bottom cutter 8 in horizontal position. IVhen, therefore, cuttingT-irons, the two cutters 4 and 5 secured tothe slide rest cut, togetherwith the long cutter. 6, the fiange of the T-iron, while the cutter 4with its horizontal edge in combination with the interchangeable cutter8, cuts the web of the T-iron. In cutting angle-irons, for instance,with the right hand slide rest 3, the upper cutter 4 guided by the sliderest, and the interchangeable long cutter 6, eut the horizontal flangeof the angle-iron, while the cutter 4, together with the interchangeablecutter 7, cuts the vertical flange. If, for instance, angle-iron is cutin the left hand slide rest, the cutter 5 is not cutting, as thedownwardly depending flange of the T-iron is, of course, non-existent inthe angle-iron.

F ig. G shows another arrangement of the cutters for cutting T-ironswith horizontally placed flange. The machine body 1 and the slide rest 2are arranged accordingly. The slide-rest top cutter 4 is laterallyadjustable to the extent 9, so that it can cut the whole iiange of theT-iron. The slide rest cutter 5 is unchanged as also the bottom cutterS. The cutter G is removed and replaced by a cutter 10. As the web ofthe T-iron is, in the present case, arranged at the point at which, inFig. 3 on the left hand, is placed the bottom portion of the flange, thecutters 5 and 8 can be used without changing their construction andposition. The support cutter 4, advanced to the extent 9, cuts, incombination with the critters 10 and S, the flange of the T-iron, whilethe slide rest bottom cutter 5, in cooperation with the cutter 10, cutsthe web of the T-iron,

In order to maintain the same angle when repeatedly cutting in obliquedirection, tables 11 and 12 (Fig. 2) are provided with two cylindricalblocks 13, 13 and 14, 14, forming stops, longitudinally adjustable, inslots l5, 15 and 16, 1G, of the tables 1l and 12, in which they can befixed by screws 17 and 18. Moreover, in each slot 16 is arranged asupport block 19, of which the surface is flush with the upper edge ofthe cutter 8, and which serves to support one fiange of the angle-ironor one half of the fia-nge or the web of the T-iron.

The stop block 13 is used when the article to be cutis introduced fromthe front, and the block 14 is used when the article to be cut, has tobe introduced from the back.

When the girder to be cut is introduced from the front, it must be helddown. This is effected by means of holding-down devices shown in Figs. 7to 9, and comprising an upper part 20 which is adjustable to suit thesize of the angle to be eut, and can be turned on its fixing screw 22.Its free end 23 is bent upwards at an angle of 45 and carries a setscrew 25 with lock nut 24, directed with its bottom end towards the work21, This set screw presses in the corner of the work 2l to be cut, andholds it in position.

According as the work 21 is to be cut, straight, or at an angle, theupper part 20 oi the holding-down device, is rotated about the clampingscrew 22 and set. The

set screw 25 is adjusted to suit the thickness of the The bottom part 26of the holding-down device is held by the same clamping screw 22, as theupper part. The bottom part 26 may be iixed, together with the upperpart 20, by means of the clamping screw 22, or separately by means oiindependent fastening devices.

When cutting T-irons, it is necessary to take care that the two cuttingedges 28 should be in line and at the same distance from the material tobe'cut, as the cutting edge 29 (Figs. 10, ll and l2). The smaller thedistance of the said cutters from the T-iron, the neater will be thecut. The distance of the cutters is reduced by placing distance pieces3() 3l (Fig. l0) behind the slide rest cutters 4 so that the cuttingdevices come nearer to the cross-section oi the girder. In the same waydistance pieces may be placed behind the bottom cutter 5, this beingdone by means oi' the part 32. The bottom cutter 8 also should beequally moved towards the T- girder to be cut, and a distance piece 33placed behind it. The object described, to bring the cutters nearer tothe girder to be cut, can also be obtained by placing behind the cutter6 a distance piece 34 (Fig. l2). The

frame having a plurality of Work receiving' openings, ob-

liquely guided slide rests havingl upper and lower cutters carriedthereby, interchangeable lateral cutters mounted on the frame. means foradjustably conneetin e cutters in position, tables having slots arrangedat opposite sides of the frame, supportingl blocks adjustably mounted inthe slots, and holdingr down devices having adjustable means alsomounted in the slots.

ln testimony whereof I have hereunto set my hand in presence o1 twosubscribing witnesses.

HUGO JOHN.

Witnesses 1 PAUL TEICHMANN, ERNST EBERHARDT.

